Well if it means any thing you've got narrow tipped bars and wide tip bars .I can't remember numbers and such but some of my 24" Stihl bars have a much larger radius on the tip than others .

Stands to reason a wide tip bar would be more prone to kick back .Now bear in mind they're all going to kick if you catch a tip .Now maybe not with that chain with a big long safety bar gizmo but it doesn't cut worth a hoot either .

I agree the shape can make a difference. But there is nothing that says your can't make either a laminated bar or a solid bar in those various shapes. It's not the mere fact that it's solid that somehow make sit more prone to kickback.

Logged

If the only tool you have is a hammer, you tend to see every problem as a nail. - Abraham Maslow

To cut to the chase in all this it should be assumed that all bars and chain for that matter have to possibilty of kick back potentential .Some might be by design more anti kick back but never the less they can all cut you if they get away from you .